Cap for a drinking vessel



FIG. 1 is a top, front, left perspective view of a cap for a drinking vessel shown exploded for clarity of disclosure;

FIG. 2 is a top, front, left perspective view of the cap for a drinking vessel of FIG. 1, shown assembled;

FIG. 3 is a rear, right elevation view thereof;

FIG. 4 is a front elevation view of the small screw lid, shown separated from the cap for clarity of disclosure;

FIG. 5 is a cross-directional front elevation view of the small screw lid, taken in the direction of line 5-5′ of FIG. 4; and,

FIG. 6 is a rear elevation view of the cap for a drinking vessel of FIG. 1, shown exploded for clarity of disclosure. 

CLAIM The ornamental design for a cap for a drinking vessel, as shown and described. 